Which diagnostic tool is designed specifically for older Apple computers prior to June 2013?

The correct answer is Apple Hardware Test, which is a diagnostic tool specifically created for older Apple computers manufactured before June 2013. This tool is essential for performing hardware diagnostic tests to identify potential issues with components such as memory, logic boards, and other system hardware. Users can access the Apple Hardware Test utility by holding down the ‘D’ key while starting up the computer, allowing them to run various tests on their system.

Apple Diagnostics, introduced more recently, is intended for newer models and would not be applicable to computers made before June 2013. Apple Service Diagnostic and Apple Service Toolkit are targeted more towards Apple technicians for service and repair and are not typically designed for end-user diagnostics on older computers. Thus, the Apple Hardware Test is the appropriate choice for diagnosing issues on older Apple hardware.